Improvement in bench-planes



J. A. TRAUT.V

N of.`219,186. Patented sepnz, 1879.

UNITED STATT-is" PATENT OFFICE.,

l JUSTUS A. TRAUT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO STANLEY RULEAND" LEVEL COMPANY, OF SAME PLACE.

IMPROVEMENT IN BENCH-PLANES.

Specieation forming part of Letters Patent No. 219,186, dated September2, 1879; application iiled June 9, 1879.

To all whom it 'may concern:

Be it known that i, JUSTUS A. TRAUT, of

New Britain, in the county of Hartford and State of Connecticut, haveinvented. certain `cheap plane with awooden stock.

The iirst part of the invention relates to the manner of and devices forsecuring the cap A, which holds the plane-iron in place. B designatesthe stock, made of wood, and throated or mortised 'out for theplane-iron, like ordinary plane-stocks. C designates aframe composed ofa slotted plate, a., and two arms, b b, with rounded ends. This plateextends laterally, so as to span the front of the mortise in the stock,and its arms extend backward by the sides thereof. This frame C issecured to the stock by means of a screw extending through the slot inthe plate of said frame.

N otches are formed in the upper side of the cap A, near the edges, asshown in Fig. 1, which receive the ends of the arms b b, said arms, whenthe frame is secured, forming bearings for the cap to swing on. and tohold it against the plane-irons D when the screw c is tightened."

A cap swinging on bearings and provided with tightening-screwis not newwith me 5 but the peculiar construction of these bearings enables me todispense with a long iron frame upon the top of the stock, usuallyemployed in wooden planes having` such a cap, and, furthermore, themortise in different stocks will vary somewhat, so that it is oftentimesdesirable to secure the plate farther up or down upon the inclined sideof the mortise, to bring` the ends of the arms b b at theproper distancefrom the plane-iron. The slot in the plate of the frame enables thisadjustment to be made, after which the screw is tightened to secure theframe in place.

The adjusting device which I employ in this style of plane is in thenature of an improvement upon the compound-lever adjustment patented toHenry Richards and myself in Reissue No. 7,565, dated March 20, 187 7 Anarrow mortise is made in the stock under the plane-iron D, in themiddle of its width, and upon the bottom of said mortise I secure thebase E of the adj ustin g device to the stock. This base has twostandards or projections, d e, in the former of which is the fulcrum forthe main lever F, and in the latter is one fulerum of the angle-lever G.This angle-lever, as its name implies, has two arms, the outer end ofone of which arms is pivoted to the standard e, and the outerend of theother arm is pivoted to the lever F, between its fulcrum and its free orhandle end. This lever Gis slotted longitudinally, so that the mainlever passes through and works in said slot, the two opposite sides ofthe angle-lever being connected by a bridge or pad, f, as shown. Theupper side of thispad is provided with fine transverse serrations, andthe under side of the plane-iron is serrated in like manner. The topofthe pad is slightly rounded. The position of the adjusting device upontlhe stock should be such that the serrated pad is nearly under oropposite the end of the tighteningscrew c. In fact, one of theadvantages of this construction of the compound lever is that theconnection with the plane-iron may be directly opposite thetightening-screw., so that fine serrations may be employed without anydanger of disengagement by the springing of the plane-iron, because thetightening-screw Will not allow the iron to sprin g at that point.

The plane-iron is set in position with its end somewhere near the bottomface of the stock, and then its upper end is allowed to engage theserrated surface of the bridge on the anglelever. The cap-plate is thenplaced and secured in position, as shown in Fig. 1. Pressing down uponthe outer end of the main lever F will depress the arm of theangle-lever, which is pivoted to said main lever, causing theangle-lever to turn on itsfulcrnm in the standard c, when the bridgewill be carried forward, and the plane-iron with it, to project itscutting-edge more or less, as may be desired.

The reverse movement of the lever draws the plane-iron backward. f l

I am aware that the plane-iron and Various ad justin g devices havingcoarse notches Vor serrations taking;1 into each other at various pointsnot opposite the tightening-screw have heretofore been used, and Ihereby disclaim the same.

I claiml. In a bench-plane, the frame C, composed of slotted plate a andarms b b, in combination with an ordinarywooden plane-stock andholding-cap, substantially as described, and for the purpose specified.

2. In a bench-plane, the combination of the holding-cap havingtightening-screw at its upper end, the plane-iron with inc serrationsupon the underside, and an adjusting mechanism having a finely-serratedpad for en gagin g those in the iron, and with said pad located oppositethe proper position for the tightening-screw, substantially asdescribed, and for the purpose specified.

3. In a bench-plane, the combination of the base-plate E, the main leverF, pivoted thereto, and the angle-lever G, having one of its armspivoted to said base-plate and the other arm pivoted to the main lever,and also provided with a Vdevice for connecting it with the planeiron,substantially as described, and for the purpose specified.

JUSTUS A. TRAUT.

Witnesses:

T. A. GONKLIN, JAMES SHEPARD.

